Improved performance of the laser guide star adaptive optics system at Lick Observatory

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Results of experiments with the laser guide star adaptive optics system on the 3-meter Shane telescope at Lick Observatory have demonstrated a factor of 4 performance improvement over previous results. Stellar images recorded at a wavelength of 2 {micro}m were corrected to over 40% of the theoretical diffraction-limited peak intensity. For the previous two years, this sodium-layer laser guide star system has corrected stellar images at this wavelength to {approx}10% of the theoretical peak intensity limit. After a campaign to improve the beam quality of the laser system, and to improve calibration accuracy and stability of the adaptive optics system ... continued below

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823 Kilobytes pages

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An, J R; Avicola, K; Bauman, B J; Brase, J M; Campbell, E W; Carrano, C et al. July 20, 1999.

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Results of experiments with the laser guide star adaptive optics system on the 3-meter Shane telescope at Lick Observatory have demonstrated a factor of 4 performance improvement over previous results. Stellar images recorded at a wavelength of 2 {micro}m were corrected to over 40% of the theoretical diffraction-limited peak intensity. For the previous two years, this sodium-layer laser guide star system has corrected stellar images at this wavelength to {approx}10% of the theoretical peak intensity limit. After a campaign to improve the beam quality of the laser system, and to improve calibration accuracy and stability of the adaptive optics system using new techniques for phase retrieval and phase-shifting diffraction interferometry, the system performance has been substantially increased. The next step will be to use the Lick system for astronomical science observations, and to demonstrate this level of performance with the new system being installed on the 10-meter Keck II telescope.

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823 Kilobytes pages

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  • SPIE 44th Annual Meeting of the International Symposium on Optical Science, Engineering, and Instrumentation, Denver, CO (US), 07/18/1999--07/23/1999

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  • Report No.: UCRL-JC-134956
  • Report No.: YN0100000
  • Report No.: 97-ERD-037
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 13892
  • Archival Resource Key: ark:/67531/metadc624162

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  • July 20, 1999

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  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 1:29 p.m.

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An, J R; Avicola, K; Bauman, B J; Brase, J M; Campbell, E W; Carrano, C et al. Improved performance of the laser guide star adaptive optics system at Lick Observatory, article, July 20, 1999; California. (digital.library.unt.edu/ark:/67531/metadc624162/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.